Method for making high-voltage four-position load switch of sulfur hexafluo ride

Abstract

Sulphur hexafluoride as insulating medium with certain pressure is filled to sealed gas box made from stainless steel. T type rotary moving contact of switch is setup inside the gas box. Three relevant static contacts are setup at circumferential direction of the moving contact. Three fuses and three tubes of fuses are setup at upper part inside the gas box. Three rows of sleeves in high voltage are setup horizontally at front sidewall of the gas box. Internal conductor connects fuses to sleeve in high voltage at lowest row. There is a controlling gearbox setup on a sidewall of the gas box. Advantages are: one piece of disclosed switch equivalent to three piece of current switch, small size, low cost, pan seal, no oil and free from maintenance.

Description

technical field [0001] The invention relates to a manufacturing method of power transmission and distribution equipment, in particular to a manufacturing method of a sulfur hexafluoride high-voltage four-position load switch. Background technique [0002] The traditional load switch is an oil-immersed four-position load switch. This load switch uses transformer oil as the arc extinguishing and insulating medium, which does not meet the oil-free requirements of the switch. It is very inconvenient for maintenance, and the transformer oil will be easily carbonized due to arc burning. , so that the insulation capacity is reduced, and at the same time, there is always the possibility of burning transformer oil. Later, people invented the sulfur hexafluoride high-voltage two-position or three-position load switch, which realized the oil-free requirement. However, to form a ring network scheme, it must be composed of more than three switches, which are bulky a...

AI Technical Summary

Problems solved by technology

[0002] The traditional load switch is an oil-immersed four-position load switch. This load switch uses transformer oil as the arc extinguishing and insulating medium, which does not meet the oil-free requirements of the switch. It is very inconvenient to overhaul, and the transformer oil will be easily carbonized due to the burning of the arc. , so that the insulation capacity is reduced, and at the same time, there is always the possibility of burning transformer oil

Later, people invented the sulfur hexafluoride high-voltage two-position or three-position load switch, which realized the oil-free requirement. However, when forming a ring network scheme, it must be composed of more than three switches, which are large in size and high in cost.

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